摘要
利用颗粒物在线观测仪、污染气体在线观测仪、现时天气现象传感器以及自动气象站,于2008年1月对广州大气污染物质量浓度、能见度和气象因子进行了连续观测.结果发现:ρ(PM2.5)与ρ(NO2)日变化趋势基本相似且均呈双峰现象,分别出现在09:00—10:00和19:00—21:00时段;ρ(SO2)呈单峰现象,出现在08:00—13:00时段.ρ(PM2.5),ρ(SO2),ρ(NO2),ρ(NO)和ρ(O3)日均值分别为(82.8±66.0),(81.6±80.9),(106.5±67.2),(66.1±57.0)和(25.1±17.0)μg/m3,能见度日均值为(6.8±4.4)km.能见度与ρ(PM2.5)和相对湿度呈负相关关系,相关系数均为-0.47.研究还表明,低边界层高度、小风天气、高水平的污染物质量浓度和相对湿度是导致广州低能见度天气的主要因素.
Continuous observation of PM2.5 , SO2 , NO2 , NO,O3, visibility and meteorological factors were conducted with an Rp1400a particle analyzer, thermo gas analyzers, PWD22 weather detector and MAWS weather station in Guangzhou in January 2008. The results indicated that the trends of the diurnal variation of PM2.5 and NO2 were similar, both showing two peaks during 09：00 to 10：00 and 19：00 to 21：00. The trend of the diurnal variation of SO2 showed one peak during 08：00 to 13：00. The average mass concentrations of PM2.5, SO2, NO2, NO and O3 were （82.8 ± 66.0）, （81.6 ± 80.9）, （106.5 ± 67.2）, （66.1 ± 57.0） and （25.1 ± 17.0） μg/m^3 , respectively. The average visibility was （6.8 ± 4.4） kin, which was negatively correlated with PM2.5 and relative humidity, with a correlation coefficient of - 0.47. The results also showed that the main factors resulting in poor visibility in Guangzhou were low height of planet boundary layer, breezy weather, high mass concentrations of air pollutants and relative humidity.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2008年第6期161-165,共5页
Research of Environmental Sciences
基金
中央级公益科研院所基本科研业务专项基金项目(ZX20071201)
